If you don't love dealing with the download window every time you save a new file, you may really like Download Statusbar (I know I do). It gives you an unobtrusive view of your recent downloads, hides when you're not using it, and lets you easily manage opening, clearing, renaming, or deleting downloaded files without ever leaving your main browser window. This is one of those extensions that I used to love but totally forgot about after reinstalling Windows/Firefox several months ago; I'm glad to have it back in my arsenal. Download Statusbar works anywhere the 'fox does.